Automatic burette.



No. 844,686. PATENTED FEB, 19, 1907.

' A.-J. MARSOHALL.

' AUTOMATIC BURETTE.

APPLICATION TILED OCT IS, 1904.

. filled with liquid by UNITED STATEg PATENT OFFICE.

AUTOMATIC BURETTE.

Specification of Letters Patent.

Patented Feb. 19, 1907.

Application filed Oc'toher 19,1904. Serial No: 229,072.

To cnli/ whom, it may concern:

Be it known that I, AnoLr J. Mmsonum, a citizen of the United States, residing at Little Falls, in the county of Hcrkimer State of New York, have invented certain new and useful Improvements in Automatic Burettes, of which the following is a speciiiv cation.

This invention relates to automatic burettes, and has for its object to provide a burette simple in construction, durable, and in expensive of manufacture.

\Vith the above and other objects in view the present invention consists in the combination and arrangement of parts hereinafter fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims.

in the drawings, Figure 1 is a view, partly in section and partly in elevation, illustrating one form of my invention; and Fig. 2 is a similar view of a modified form of the invention.

Referring now more particularly to the accompanying drawings, and especially to Fig. 1, 1 illustrate an automatic burette consisting of bottle or receptacle A, connected at its upper end. with a burette-tubc B. tube is so arranged with respect to the bottle that when the latter is filled with liquid through the neck a/ to a point below where the burette-tube is tilting the bottle. The surplus liquid in the burettc-tube will run back into the bottle upon a level, and in the construction shown in Fig. 1 the burette-tubc will be filled to the point 0 when the bottle is placed upon a level, and this point 0 alincs with the zero-mark of the tube.

The burette-tube is provided on its inside with a lip c, and this lip c is designed to produce a s' iarp level in the burettc-tube when the bottle is in vertical position. place the zero-mark a little below the bend of the tube and substantially e, as at d, and, if desired, 1 may draw out and This

attached the tube can be 1 when the bottle is placed I prefer to l opposite tlte lip l l enough liquid through the faucet at the lower l end of the tube to bring the level to the zero- 1 point.

' It may be desired to have the burette-tube detachable with respect to the bottle or vessel, so that in the event of breakage a new tube may be substituted for the broken one. For instance, in Fig. 2 1 illustrate a structure l wherein the bottle or receptacle A has the burctte-tube B attached thereto by a perforated stopper 1). In this modified form of the invention the zero-mark of the tube will be substantially adjacent the lip e, as indicated at d.

I am fully aware that it would be difiicu t, if not impossible, to ill the burettc-tube in the way described if the inside diameter is small; but with the standard size of burettetubes there will be no difliculty inv this re spect.

I do not limit myself to any special shape,

1 l l l l size, or construction of the bottle or recepj tacle nor to any special construction of burctto-tube; but l What I do claim as my invention, and del sire to secure by Letters Patent, isl 1. An instrument of the character described, comprising a reservoir having an inlet and an outlet near its upper end, a perforatcd stopper fitted in the outlet-opening, '1, graduated burette-tubc fitted in the perforation of the stopper and provided with a valve at its free end and a lip adjacent the stopper. An instrument of the character dej scribed comprising a reservoir, a graduated j burettctube having a bent portion commuj nicating with the reservoir and provided in I said bent portion with an integral lip.

In testimony whereof I have signed my l name to this specification in the presence of two witnesses.

! ADOLF J. MARSCHALL.

l Witnesses:

C. J. LUNDSTROM, James H. \VA'rTs. 

